Malachite — Ruth Langan

From the wilds of Montana emerges one last Jewel, an unknown brother burning with hatred for his father's mighty legacy. Malachite--as wild as the devil stallion he has vowed to vanquish. But he cannot conquer the way his Comanche blood rages for gentle mother and widow Millie Potter. For in her devoted gaze and loving arms he knows his lonely heart has finally found a home.

The Infamous Jewels of Texas -- Diamond, Pearl, Jade and Ruby -- Must Face One Final Secret